Laminated multilayer insulating glass and a spacer for the laminated multilayer insulating glass

Abstract

A multilayer insulating glass having at least two panes of glass and a resistance heating element on a glass surface. The panes are separated by a spacer comprising two parallel hollow sections and an insulating web of unfoamed and cured polyurethane casting compound filling the interspace between the hollow sections. The web forms a hard and permanent bond with the hollow sections, creating a spacer having relatively high torsional rigidity and electrical insulation and having relatively low thermal conductivity.

I claim: 
     
       1. Heatable multilayer insulating glass comprising at least two panes of glass held a distance apart by means of a spacer with a gas-filled or evacuated interspace (3) between the panes and a resistance heating element on a glass surface facing the interspace and with connections for supplying an electric current to the resistance heating element, and wherein: the spacer (6) comprises two parallel hollow sections (7, 8) arranged with some distance between them and having side walls (7a, 7b and 8a, 8b) parallel to the glass surfaces, the mutually-facing surfaces (7b, 8b) defining an interspace (15) between the hollow sections;   a solid web (16) of an unfoamed and fully-cured polyurethane casting compound fills the interspace (15) between the two hollow sections (7, 8) and adheres well to the mutually-facing surfaces (7b, 8b) of the side walls of the hollow sections (7, 8); and   the web is hard and forms a permanent bond with the hollow sections so that the hollow sections and hard web bonded thereto create a uniformly strong spacer having relatively high torsional rigidity and electrical insulation, and having relatively low thermal conductivity between the panes.   
     
     
       2. Multilayer insulating glass according to claim 1, characterized in that the hollow sections (7, 8) of the spacer (6) are filled with a desiccant (11). 
     
     
       3. Multilayer insulating glass according to claim 1, characterized in that a cement (12) is provided between the walls (7a and 8a) and the surfaces of the panes of glass (1 and 2) facing the interspace. 
     
     
       4. Multilayer insulating glass according to claim 1, characterized in that a space (13) below the spacer (4) and the panes (1, 2) is filled with a cement compound. 
     
     
       5. Multilayer insulating glass according to claim 1, characterized in that the spacer hollow sections (7, 8) are made of metal. 
     
     
       6. Multilayer insulating glass according to claim 5, characterized in that the hollow sections (7, 8) are made of aluminum. 
     
     
       7. Multilayer insulating glass according to claim 5, characterized in that the hollow sections (7, 8) are made of steel. 
     
     
       8. Spacer especially for producing a heatable multilayer insulating glass characterized by at least two panes of glass held a distance apart by a spacer in an interspace (3) between the panes and a resistance heating element on a glass surface facing the interspace, the spacer (6) comprising: two parallel hollow sections (7, 8) arranged with some distance between them and having side walls (7a, 7b and 8a, 8b) parallel to the glass surfaces;   a solid web (16) of an unfoamed and fully-cured polyurethane casting compound filling the interspace (15) between the two hollow sections (7, 8) and adhering well to the mutually-facing surfaces (7b, 8b) of the side walls of the hollow sections (7, 8); and   the web being hard and forming a permanent bond with the hollow sections so that the hollow sections and the hard web bonded thereto create a uniformly strong spacer having relatively high torsional rigidity and electrical insulation, and relatively low thermal conductivity across the side walls (7b, 8b).   
     
     
       9. Multilayer insulating glass comprising: at least two panes of glass held a distance apart by means of a spacer with a gas-filled or evacuated interspace (3) between the panes;   the spacer (6) comprising two parallel hollow sections (7, 8) arranged with some distance between them and having side walls (7a, 7b and 8a, 8b) parallel to the glass surfaces, the mutually-facing surfaces (7b, 8b) defining an interspace (15) between the hollow sections;   a solid web (16) of an unfoamed and fully-cured polyurethane casting compound filling the interspace (15) between the two hollow sections (7, 8) and adhering well to the mutually-facing surfaces (7b, 8b) of the side walls of the hollow sections (7, 8); and   the web being hard and forming a permanent bond with the hollow sections so that the hollow sections and hard web bonded thereto create a uniformly strong spacer having relatively high torsional rigidity and electrical insulation, and having relatively low thermal conductivity between the panes.   
     
     
       10. Spacer for producing either an electrically heatable or a nonheatable multilayer insulating glass comprising at least two panes of glass held a distance apart by a spacer (6) in an interspace (3) between the panes, the spacer comprising: two parallel hollow sections (7, 8) arranged with some distance between them and having side walls (7a, 7b and 8a, 8b) parallel to the glass surfaces;   a solid web (16) of an unfoamed and fully-cured polyurethane casting compound filling the interspace (15) between the two hollow sections (7, 8) and adhering well to the mutually-facing surfaces (7b, 8b) of the side walls of the hollow sections (7, 8); and   the web being hard and forming a permanent bond with the hollow sections so that the hollow sections and the hard web bonded thereto create a uniformly strong spacer having relatively high torsional rigidity and electrical insulation, and relatively low thermal conductivity across the side walls (7b, 8b).